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5.
If the [Communication with GT01-RS4-M] dialog box
is closed, communication setting contents for GT01-
RS4-M does not remain.
• To maintain the communication setting contents,
click
(export).
• To use communication setting contents which are
saved previously, click
■ Exporting/Importing the communication
setting contents
Setting the multi-drop system information
function
When checking the connection status of each GOT
which is connected to GT01-RS4-M on the PLC side,
set the multi-drop system information function.
The GOT connection status is stored in the PLC side
word device.
(1) Setting on the PLC side word device
1.
Select [Use the system information of Multidrop] and
click the [Set] button. The following dialog window is
displayed.
2.
Set the PLC side word device to [Head Device (10
Points)]. In this example, "D0" is set.
(import).
29.5 Setting of Serial Multi-Drop Connection Unit
(2) Assignment contents of the PLC side word device
The following table shows the device assignment
contents when setting [Head Device (10 Points)] to
"D0".
Device
D0 (Head device+0)
Control signal 1-1
D1(Head device+1)
Station information notification signal
D2(Head device+2)
(Reserve)
D3(Head device+3)
(Reserve)
D4(Head device+4)
(Reserve)
D5(Head device+5)
Slave station control signal
D6(Head device+6)
(Reserve)
D7(Head device+7)
(Reserve)
D8(Head device+8)
(Reserve)
D9(Head device+9)
(Reserve)
(3) Details on the word device assignment contents
(a) Control signal 1-1
Bit position
bit0
10 second cycle flicker signal
bit1 to 15
(Reserve)
< 10 second cycle flicker signal
By the repetition of turning ON/OFF every 5
seconds, the connection between GT01-RS4-M
and the PLC can be confirmed on the PLC side.
When no repetition of this ON/OFF is observed,
GT01-RS4-M is not connected to the PLC.
5sec
5sec
ON
OFF
*1
When writing or clearing data on the program area from the
personal computer to the PLC using FA transparent function,
flicker of the signal as shown above may be temporarily
stopped.
(b) Station information notification signal
This signal notifies the status of the slave station
(GOT) which is connected to the master station
(GT01-RS4-M). Only the bit corresponding to the
number of connected slave station (GOT) is turned
ON and other bits are turned OFF.
bit15
bit14
..................
Station
Station
..................
No. 15
No. 14
• 1: Connected
• 0: Unconnected (Including communication error
status)
*2
When the communication between GT01-RS4-M and the
PLC becomes faulty, the station information notification
signal is not updated.
29. GOT MULTI-DROP CONNECTION
Description
Description
*1
>
*2
bit2
bit1
bit0
Station
Station
Station
No. 2
No. 1
No. 0
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